Function sanitize_for_comment 

pub fn sanitize_for_comment(input: &str) -> String

👎Deprecated since 0.4.0: Do not use - backslash escaping doesn’t work in Rust comments. Use quote! macro instead.

DEPRECATED AND UNSAFE: Do not use for user input in comments

⚠️ SECURITY FIX #2

This function is FUNDAMENTALLY UNSAFE and should never be used for user input.

Problem: In Rust block comments /* ... */, backslash has NO special meaning. Therefore, escaping with backslash provides no protection against breakout attacks.

Example attack:

input = r"\*/"
escaped = r"\\*\/"  // Attempted escaping
in_comment: /* \\*\/ */  // The */ STILL ends the comment!

Migration

Use quote! macro for user input instead:

quote! { let comment = #user_input; }  // Properly escaped

Or use line comments with escaped newlines:

let comment = format!("// {}", user_input.replace('\n', "\\n"));

Reason for Deprecation

Backslash escaping does not work in Rust comments. This function was based on a false assumption about comment semantics and cannot provide real protection.